Sony A7R vs Sigma DP3Merrill

OvinceZ, I don't think your comparison here is anything close to scientific, it is flawed on many levels, starting with fact that you started by comparing different focal lengths. Where else you went wrong is anybody's guess that can cause lots of time to be wasted on wild goose chase so I will tell you just one thing: Your conclusion about A7R's abilities is completely off. As an owner of A7R that has tried quite a few lenses on it I know that A7R does produce extremely detailed and bitingly sharp images when paired with right lens and taken in right way. For example, shots taken with Contax G45 at F8 on it blow me away. Thanks to such results, and fact that with A7R I am not having issues I would have with Sigma DP (for example, performance with high ISO), I am not tempted with Sigma DP anymore.